My Inquiry
My Account
Microchip Technology 1N5941BUR-1/TR
- Part No.:
- 1N5941BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N5941BUR-1/TR.pdf
- Description:
- DIODE ZENER 47V 1.25W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,861
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5941BUR-1 from Microsemi is a 1.5 W surface-mount Zener diode in DO-213AB (MELF) glass package, rated for 47 V ±5% Zener voltage at 8.0 mA test current, with 67 Ω dynamic impedance and 35.8 mA maximum Zener current. It delivers stable voltage regulation in high-density power supply rails and precision reference circuits across industrial temperature ranges.
For engineers reviewing the 1N5941BUR-1 datasheet, 1N5941BUR-1 pinout, 1N5941BUR-1 application, or 1N5941BUR-1 equivalent, key selection criteria include its hermetically sealed MELF construction, MIL-PRF-19500 screening capability, low thermal resistance (RθJEC = 40 °C/W), RoHS-compliant plating, and ESD insensitivity per MIL-STD-750 Method 1020.
Technical Context
This device operates as a two-terminal voltage regulator in reverse-biased breakdown mode, with Zener voltage specified at TEC = 30 °C and measured 90 seconds after DC current application. Its metallurgically bonded tungsten slug structure ensures low thermal resistance and enhanced reliability under thermal cycling.
The 1N5941BUR-1 exhibits 0.25 µA reverse leakage at 35.8 V (76% of VZ) and maintains regulation over IZ = 1.0–35.8 mA, with capacitance ~33 pF (per Figure 2). It is radiation-hardened per Microsemi MicroNote 050 and non-sensitive to ESD per MIL-STD-750 Method 1020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V ±5% at IZT = 8.0 mA - defines nominal regulation point with tight tolerance for precision references. |
| Power Dissipation | 1.5 W @ TEC ≤ 115 °C - supports continuous operation in compact layouts with adequate end-cap heatsinking. |
| Dynamic Impedance (ZZT) | 67 Ω at IZT = 8.0 mA - determines output voltage variation under load current changes. |
| Max Zener Current (IZM) | 35.8 mA - sets absolute upper limit for safe DC regulation without exceeding 1.5 W derated power. |
| Junction Temperature Range | −65 °C to +175 °C - enables deployment in extended industrial, aerospace, and downhole environments. |
| Thermal Resistance (RθJEC) | 40 °C/W - allows direct thermal path to PCB copper or metal heatsink via end caps, critical for power density. |
| Reverse Leakage (IR) | 0.25 µA @ VR = 35.8 V - ensures minimal quiescent current in standby or low-power monitoring circuits. |
Pinout & Package
DO-213AB (MELF) glass package: hermetically sealed voidless hard glass body with tungsten slugs; cathode indicated by single band; tin/lead or RoHS-compliant matte tin plating; weight ≈ 0.05 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Current sink in Zener mode | Connected to lower-potential node; carries full Zener current during regulation. |
| Cathode (banded end) | Regulated output node | Provides stable 47 V reference; must be held positive relative to anode for breakdown operation. |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgically bonded internal contacts | Reduces thermal resistance and improves long-term stability under thermal stress cycles. |
| Hermetic glass sealing | Prevents moisture ingress and parameter drift in humid or corrosive environments. |
| MIL-PRF-19500 screening option | Enables use in high-reliability programs requiring military-grade qualification and lot traceability. |
| ESD immunity per MIL-STD-750 Method 1020 | Eliminates need for external ESD protection in handling and assembly of sensitive systems. |
| Low capacitance (~33 pF) | Minimizes high-frequency loading in RF bias networks and fast-switching power control loops. |
Applications
| Industrial Power Supply Regulation | Aerospace Reference Voltage Source |
|---|---|
Use Scenario: Stabilizing auxiliary 48 V rail in programmable logic controller (PLC) backplane power distribution. IC Role / Device Role / Timing Role: Two-terminal shunt regulator maintaining precise 47 V output despite input ripple and load transients. Use Value: Enables consistent ADC reference and FPGA I/O bank biasing without active feedback circuitry. |
Use Scenario: Providing primary voltage reference for radiation-tolerant telemetry conditioning in LEO satellite payloads. IC Role / Device Role / Timing Role: Hermetically sealed, radiation-hardened Zener establishing stable 47 V reference for analog sensor front-ends. Use Value: Meets MIL-PRF-19500 screening requirements while delivering <10 ppm/°C tempco performance. |
| Downhole Oilfield Instrumentation | High-Density Telecom DC-DC Bias Network |
Use Scenario: Regulating bias voltage for piezoelectric pressure transducers operating at 150 °C wellhead temperatures. IC Role / Device Role / Timing Role: High-temperature Zener clamp protecting amplifier inputs from overvoltage during transient events. Use Value: Sustains regulation up to +175 °C junction temperature with no parameter shift or parametric failure. |
Use Scenario: Generating local 47 V bias for GaN FET gate drivers in 1U server power modules. IC Role / Device Role / Timing Role: Compact MELF Zener supplying stable gate drive voltage in space-constrained multilayer PCBs. Use Value: Achieves >3× higher power density than axial DO-41 equivalents while reducing parasitic inductance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5941B | Axial-leaded DO-41 package; identical electrical specs but higher RθJA (120 °C/W vs. 40 °C/W); no MIL-PRF-19500 screening option. | Suitable for prototyping and low-volume through-hole assemblies; not recommended for high-density or high-reliability SMT designs. | Select 1N5941B only when board assembly uses wave soldering or legacy through-hole infrastructure. |
| SMBG5941B | Surface-mount SMB package; same VZ, IZM, and tolerance; RθJA = 100 °C/W; RoHS-compliant; no hermetic seal or radiation hardness. | Applicable in commercial telecom and consumer power supplies where cost and footprint dominate over reliability and environmental robustness. | Choose SMBG5941B for cost-sensitive, high-volume production where hermeticity and radiation tolerance are unnecessary. |
Compared with 1N5941B and SMBG5941B, the 1N5941BUR-1 uniquely combines MELF packaging, hermetic glass sealing, metallurgical bonding, MIL-PRF-19500 screening eligibility, and superior thermal performance-making it the only choice for mission-critical, high-temperature, or radiation-exposed Zener regulation.
Availability
1N5941BUR-1 is available at Aetrix Electronics and suitable for industrial power supply regulation, aerospace reference voltage sources, downhole instrumentation, and high-density telecom DC-DC bias networks requiring stable component supply, long-term obsolescence management, and qualified sourcing.
Supply support for 1N5941BUR-1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microsemi Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and high-voltage analog components for aerospace, defense, and industrial markets.
The 1N5941BUR-1 belongs to Microsemi's metallurgically bonded MELF Zener series, engineered for applications demanding hermetic integrity, thermal resilience, and MIL-spec compliance in harsh operating environments.
FAQ
What is the Zener voltage tolerance and test condition for the 1N5941BUR-1?
The 1N5941BUR-1 has a Zener voltage of 47 V with ±5% tolerance, measured at a test current (IZT) of 8.0 mA and end-cap temperature (TEC) maintained at 30 °C. Voltage is recorded 90 seconds after DC current application to ensure thermal stabilization, per Microsemi T4-LDS-0300-1 specification.
Does the 1N5941BUR-1 support MIL-PRF-19500 screening?
Yes, the 1N5941BUR-1 is eligible for screening per MIL-PRF-19500 when ordered with appropriate reliability level suffixes (e.g., MQ, MX, MV, MSP). Screening includes environmental stress testing, lot traceability, and quality assurance documentation required for defense and aerospace programs.
What is the maximum steady-state power dissipation for the 1N5941BUR-1?
The 1N5941BUR-1 has a rated average power dissipation (PM(AV)) of 1.5 W. At ambient temperature (TA) = 25 °C on FR4 with 1 oz Cu, it is derated to 1.25 W; full 1.5 W is permitted only when end-cap temperature (TEC) is held ≤ 115 °C, leveraging its 40 °C/W junction-to-end-cap thermal resistance.
Is the 1N5941BUR-1 RoHS compliant?
Yes, the "-1" suffix in 1N5941BUR-1 indicates RoHS-compliant matte tin plating over copper terminals. The device meets EU RoHS Directive 2011/65/EU and is compatible with lead-free reflow profiles up to 260 °C for 10 seconds, as verified in Microsemi's qualification testing.
How does the DO-213AB (MELF) package of the 1N5941BUR-1 improve thermal performance versus DO-41?
The 1N5941BUR-1's DO-213AB MELF package achieves RθJEC = 40 °C/W due to direct thermal conduction through metallurgically bonded tungsten slugs to PCB copper pads, whereas the axial DO-41 version (1N5941B) relies on lead-frame conduction and exhibits RθJA = 120 °C/W - making the 1N5941BUR-1 significantly more effective in thermally constrained SMT applications.
1N5941BUR-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF (Glass)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±5%
- Power - Max:
- 1.25 W
- Impedance (Max) (Zzt):
- 67 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 35.8 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AB (MELF, LL41)
1N5941BUR-1/TR FAQ
1.How can I place an order for 1N5941BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5941BUR-1/TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1N5941BUR-1/TR reliable?
The price and inventory of 1N5941BUR-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5941BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5941BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5941BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5941BUR-1/TR?
1N5941BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5941BUR-1/TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1N5941BUR-1/TR?
For technical support, including 1N5941BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5941BUR-1/TR requirements.
6.How does Aetrix verify that 1N5941BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5941BUR-1/TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1N5941BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5941BUR-1/TR?
All 1N5941BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5941BUR-1/TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1N5941BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5941BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5941BUR-1/TR Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
